ax+7 |
bx+11 |
∴當(dāng)x=0時(shí),
ax+7 |
bx+11 |
7 |
11 |
當(dāng)x=1時(shí),
ax+7 |
bx+11 |
a+7 |
b+11 |
∴
7 |
11 |
a+7 |
b+11 |
∴b=
11a |
7 |
∴
a |
a+b |
a | ||
a+
|
7 |
18 |
故選C.
ax+7 |
bx+11 |
a |
a+b |
7 |
11 |
11 |
7 |
7 |
18 |
11 |
18 |
ax+7 |
bx+11 |
ax+7 |
bx+11 |
7 |
11 |
ax+7 |
bx+11 |
a+7 |
b+11 |
7 |
11 |
a+7 |
b+11 |
11a |
7 |
a |
a+b |
a | ||
a+
|
7 |
18 |